CN213107980U

CN213107980U - Injection mold structure with retracted water gap

Info

Publication number: CN213107980U
Application number: CN202021322433.6U
Authority: CN
Inventors: 南基学
Original assignee: Dongguan Yejia Electronic Technology Co ltd
Current assignee: Dongguan Yejia Electronic Technology Co ltd
Priority date: 2020-07-07
Filing date: 2020-07-07
Publication date: 2021-05-04
Anticipated expiration: 2030-07-07

Abstract

The utility model provides an injection mold structure with a retracted water gap, which comprises a panel, a water gap plate, a front template, a rear mold base and a bottom plate, wherein the front template is provided with a front mold cavity, the rear template is provided with a rear mold cavity, a stripping and abdicating cavity is arranged in the rear mold base, a shunt channel is connected between the rear mold cavities, a hot single nozzle is arranged in the front template, a main channel is arranged in the hot single nozzle, a steel sleeve shell is sleeved on the hot single nozzle, a heating component is arranged between the steel sleeve shell and the hot single nozzle, and a heat insulation layer covers the inner wall of the steel sleeve shell; the bottom of the rear die cavity is connected with a body ejection hole, a limiting cavity is arranged outside the body ejection hole, the bottom of the shunting channel is connected with a water gap ejection hole, a body ejector pin is slidably connected in the body ejection hole, a limiting block is fixed at the bottom of the body ejector pin, and a water gap ejector pin and a delay ejector pin are fixed on the ejector plate. The utility model discloses can effectively reduce heat loss, can move down fore-and-aft mouth of a river spare and indent in the longitudinal span of injection mold chamber, need not to carry out extra processing that cuts.

Description

Injection mold structure with retracted water gap

Technical Field

The utility model relates to an injection mold specifically discloses an injection mold structure of mouth of a river indentation.

Background

Injection molding is a method for producing and molding industrial products, wherein thermoplastic or thermosetting materials are made into plastic products with various shapes by using a plastic molding die, and most of the existing injection molds are made of thermoplastic materials.

Use thermoplastic's injection mold, melting plastic fills the die cavity of moulding plastics from the sprue through the subchannel, for ensureing the shaping effect, prior art adopts hot list to chew the structure more and realizes advancing gluey, at the in-process that opens and shuts the mould, each sheet layer structure can form relative motion, damage hot list and chew the structure easily, in addition, for ensureing the effect of filling glue in the die cavity of moulding plastics, form the water gap spare of serious protrusion in whole board plastic spare surface easily in the sprue, influence follow-up processing, need tailor to the convex position of water gap spare, the processing operation is complicated.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to provide a mouth of a river indentation's injection mold structure to prior art problem, can effectively protect hot single structure of chewing and the hot single heating loss of chewing low, in addition, can effectively be with mouth of a river spare indentation in whole board plastic part, can provide good processing condition.

In order to solve the prior art problem, the utility model discloses an injection mold structure with a retracted nozzle, which comprises a panel, a nozzle plate, a front template, a rear mold base and a bottom plate which are sequentially arranged, wherein the bottom of the front template is provided with n front mold cavities, the top of the rear template is provided with n rear mold cavities, n is an integer larger than 1, a stripping abdicating cavity is arranged in the rear mold base, a branch runner is connected between each rear mold cavity, a heat single nozzle is arranged in the front template, a main runner is arranged in the heat single nozzle, the main runner is positioned right above the branch runner, a steel sleeve shell is sleeved outside the heat single nozzle, a heating component is arranged between the steel sleeve shell and the heat single nozzle, and a heat insulation layer covers the inner wall of the;

the bottom of the rear die cavity is connected with a body ejection hole, a limiting cavity is arranged outside the body ejection hole, the bottom of the shunting channel is connected with a water gap ejection hole, a body ejector pin is connected in the body ejection hole in a sliding manner, a limiting block connected in the limiting cavity in a sliding manner is fixed at the bottom of the body ejector pin, a first spring sleeved outside the body ejector pin is connected to the limiting block, an ejector plate is connected in the stripping abdicating cavity in a sliding manner, a water gap ejector pin and n delay push pins are fixed on the ejector plate, the water gap ejector pin is connected in the water gap ejection hole in a sliding manner, and the delay push pins are matched with the body ejection;

the height of the stripping abdicating cavity is H, the height of the body ejector hole is H, the length of the body ejector pin is P, the thickness of the limiting block is D, the thickness of the ejector plate is D, and the length of the delay ejector pin is Q, (P + D + Q + D) < (H + H).

Further, the heat insulation layer is an asbestos layer.

Furthermore, the heating component is an electric heating wire wound on the single hot nozzle.

Furthermore, the ejector plate is connected with a second spring, and the top of the second spring is connected to the top of the stripping yielding cavity.

Furthermore, a guide hole is formed in the bottom plate, a guide block is fixed at the bottom of the ejector plate, and the guide block is connected in the guide hole in a sliding mode.

The utility model has the advantages that: the utility model discloses an injection mold structure of mouth of a river indentation, it is provided with reliable heat preservation protective structure outside hot list is chewed, can effectively reduce the heat loss that hot list was chewed and can avoid hot list to chew because of the mould that opens and shuts is worn and torn, in addition, after pouring into quantitative molten plastic, mouth of a river thimble can realize descending the top that makes mouth of a river ejection hole and form mouth of a river indentation space, can effectively move down fore-and-aft mouth of a river spare and indent in the longitudinal span of moulding-die chamber, avoid cooling off the upper and lower surface of shaping back mouth of a river spare protrusion in whole board plastic spare, can provide good processing condition, need not to carry out extra cutting process, high machining efficiency.

Drawings

Fig. 1 is a schematic structural view of the mold closing and injection molding device of the present invention.

Fig. 2 is a schematic structural view of the nozzle of the present invention when retracted.

Fig. 3 is a schematic structural view of the mold opening and discharging of the present invention.

The reference signs are: the mold comprises a panel 10, a nozzle plate 11, a front mold plate 12, a front mold cavity 13, a bottom plate 20, a guide hole 201, a rear mold base 21, a stripping abdicating cavity 211, a rear mold plate 22, a rear mold cavity 23, a body ejection hole 231, a limiting cavity 232, a branch channel 24, a nozzle ejection hole 241, a hot single nozzle 30, a main channel 31, a steel jacket shell 40, a heat insulation layer 41, a heating assembly 50, a body ejector pin 60, a limiting block 61, a first spring 62, an ejector plate 70, a delay ejector pin 71, a nozzle ejector pin 72, a second spring 73 and a guide block 74.

Detailed Description

For further understanding of the features and technical means of the present invention, as well as the specific objects and functions attained by the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.

Refer to fig. 1 to 3.

The embodiment of the utility model discloses a mouth of a river indentation injection mold structure, include from last panel 10, mouth of a river board 11, front mould board 12, back template 22, back die holder 21 and bottom plate 20 that set gradually down, the bottom of front mould board 12 is equipped with n front mould cavitys 13, the top of back template 22 is equipped with n back die cavity 23 that matches respectively with each front mould cavity 13, n is for being greater than 1 integer, be equipped with the stripper and step down the chamber 211 in the back die holder 21, be connected with subchannel 24 between each back die cavity 23, be equipped with heat single chew 30 in the front mould board 12, be equipped with sprue 31 in the heat single chew 30, sprue 31 is located subchannel 24 directly over, during the compound die, sprue 31 is connected with subchannel 24, heat single chew 30 overcoat is equipped with steel casing 40, heat single chew 30 and steel casing 40 all are fixed in mouth of a river board 11 and front mould board 12 through spacing clamp plate, steel casing 40 can effectively protect heat single chew 30, the hot single nozzle 30 is prevented from being damaged in the die opening and closing process, the heating component 50 is arranged between the steel sleeve shell 40 and the hot single nozzle 30, the inner wall of the steel sleeve shell 40 is covered with the heat insulation layer 41, the heat insulation layer 41 is positioned on one side, far away from the hot single nozzle 30, of the heating component 50, the heat of the heating component 50 can be effectively reserved through the heat insulation layer 41, and the energy loss can be effectively reduced;

the bottom of each rear mold cavity 23 is connected with a body material ejection hole 231 penetrating through the rear mold plate 22, a limiting cavity 232 which does not penetrate through the rear mold plate 22 is arranged outside each body material ejection hole 231, the bottom of the branch channel 24 is connected with a water gap material ejection hole 241 penetrating through the rear mold plate 22, a body material ejection pin 60 is connected inside each body material ejection hole 231 in a sliding manner, the bottom of each body material ejection pin 60 is fixed with a limiting block 61 which is connected inside the limiting cavity 232 in a sliding manner, each limiting block 61 is connected with a first spring 62 which is sleeved outside the body material ejection pin 60, the first spring 62 can extend and retract inside the limiting cavity 232, a material ejecting plate 70 is connected inside the material removing and abdicating cavity 211 in a sliding manner, a water gap material ejection pin 72 and n delay ejector pins 71 are fixed on the material ejecting plate 70, and the ejector pin 72 is connected inside the water gap material ejection hole, each delay push pin 71 is matched with each body ejection hole 231, and when the mold is released, the delay push pins 71 are connected into the body ejection holes 231 in a sliding mode;

the height of the material-releasing yielding cavity 211 is H, the height of the body material-ejecting hole 231 is H, the length of the body ejector pin 60 is P, the thickness of the limiting block 61 is D, the thickness of the ejector plate 70 is D, the length of the delay ejector pin 71 is Q, (P + D + Q + D) < (H + H), sufficient delay interval can be formed between the delay ejector pin 71 and the limiting block 61, the limiting block 61 is limited in the limiting cavity 232, and (P + D) < H.

The utility model discloses when compound die is moulded plastics, as shown in figure 1, back template 22 is hugged closely to preceding template 12, form the die cavity of moulding plastics between preceding die cavity 13 and the back die cavity 23, heating element 50 work ensures that hot list is chewed 30 and is in the high temperature state, ensures the effect that the molten plastic flows, the molten plastic gets into the die cavity of moulding plastics from sprue 31 through subchannel 24, in order to ensure to be filled completely in the die cavity of moulding plastics, the volume of injecting into usually during the injection moulding is greater than all the die cavities of moulding plastics and the molten plastic, therefore all can have the molten plastic in subchannel 24 and sprue 31; after a certain amount of molten plastic is injected, an external injection molding machine stops injecting the molten plastic, as shown in fig. 2, the ejector plate 70 drives the delay ejector pin 71 and the nozzle ejector pin 72 to descend, because the limiting block 61 is limited in the limiting cavity 232, even if the delay ejector pin 71 descends, the body ejector pin 60 does not descend, the body ejector pin 60 can be ensured to effectively block the top of the body ejector hole 231, the nozzle ejector pin 72 descends to enable the top of the nozzle ejector hole 241 to form a nozzle retraction space, the molten plastic in the main runner 31 and the branch runner 24 flows into the top of the nozzle ejector hole 241, so that the liquid level of the molten plastic in the main runner 31 is effectively reduced, after cooling molding, an injection molded product is formed in the injection molding cavity, and the nozzle parts formed in the top of the nozzle ejector hole 241, the branch runner 24 and the main runner 31 do not protrude out of the upper and lower surfaces of the whole plastic plate, so as to facilitate subsequent processing, avoiding the obstruction of operations such as alignment, transportation and the like caused by the fact that the water gap piece protrudes out of the surface of the whole plastic piece; after cooling and forming, opening the mold and removing the material, as shown in fig. 3, the front mold plate 12 is separated from the rear mold plate 22, the ejector plate 70 is lifted, the water gap ejector pin 72 acts on the water gap member to eject the water gap member, and the delay ejector pin 71 acts on the limiting block 61 to push the body ejector pin 60 to eject the injection product in the rear mold cavity 23.

In this embodiment, the heat insulation layer 41 is an asbestos layer, and asbestos has good heat insulation and fire prevention functions.

In this embodiment, the heating element 50 is a heating wire provided to wind the hot single nozzle 30.

In this embodiment, the ejector plate 70 is connected with the second spring 73, and the top of the second spring 73 is connected to the top of the material-removing yielding cavity 211, so that the stability of the lifting action of the ejector plate 70 can be effectively improved.

Based on the above embodiment, the bottom plate 20 is provided with the guide hole 201, the guide block 74 is fixed at the bottom of the ejector plate 70, and the guide block 74 is slidably connected in the guide hole 201, so that the lifting track of the ejector plate 70 can be effectively limited, and the stability of the lifting action is further improved.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The injection mold structure with the retracted water gap comprises a panel (10), a water gap plate (11), a front template (12), a rear template (22), a rear mold seat (21) and a bottom plate (20) which are sequentially arranged, wherein n front mold cavities (13) are arranged at the bottom of the front template (12), n rear mold cavities (23) are arranged at the top of the rear template (22), n is an integer larger than 1, a material-releasing yielding cavity (211) is arranged in the rear mold seat (21), the injection mold structure is characterized in that a branch runner (24) is connected between the rear mold cavities (23), a hot single nozzle (30) is arranged in the front template (12), a main runner (31) is arranged in the hot single nozzle (30), the main runner (31) is positioned right above the branch runner (24), a steel casing (40) is sleeved outside the hot single nozzle (30), and a heating assembly (50) is arranged between the steel casing (40) and the hot single nozzle (30), the inner wall of the steel casing (40) is covered with a heat insulation layer (41);

the bottom of the rear die cavity (23) is connected with a body material ejecting hole (231), a limiting cavity (232) is arranged outside the body material ejecting hole (231), the bottom of the sub-runner (24) is connected with a water gap ejection hole (241), the body ejection hole (231) is connected with a body ejection pin (60) in a sliding way, the bottom of the body thimble (60) is fixed with a limit block (61) which is connected in the limit cavity (232) in a sliding way, the limiting block (61) is connected with a first spring (62) sleeved outside the body thimble (60), the stripper abdication cavity (211) is internally and slidably connected with an ejector plate (70), a water gap ejector pin (72) and n delay ejector pins (71) are fixed on the ejector plate (70), the water gap ejector pin (72) is connected in the water gap ejector hole (241) in a sliding way, the delay push pin (71) is matched with the body ejection hole (231);

the height of the stripping abdicating cavity (211) is H, the height of the body ejection hole (231) is H, the length of the body ejection pin (60) is P, the thickness of the limiting block (61) is D, the thickness of the ejection plate (70) is D, and the length of the delay push pin (71) is Q, (P + D + Q + D) < (H + H).

2. A nozzle-retracting injection mold structure according to claim 1, wherein said thermal insulation layer (41) is an asbestos layer.

3. A nozzle-retracting injection mold structure according to claim 1, wherein said heating component (50) is an electric heating wire wound around said hot single nozzle (30).

4. A nozzle-retracting injection mold structure according to claim 1, wherein a second spring (73) is connected to said ejector plate (70), and the top of said second spring (73) is connected to the top of said stripper relief cavity (211).

5. A nozzle-retracting injection mold structure according to claim 4, wherein a guide hole (201) is provided in said bottom plate (20), a guide block (74) is fixed to the bottom of said ejector plate (70), and said guide block (74) is slidably connected in said guide hole (201).